<template>
  <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>
      <!-- 卡片视图 -->
      <el-card>
          <!-- 添加角色按钮区域 -->
          <el-row>
              <el-col><el-button type="primary" @click="addRoleDialogVisible = true">添加角色</el-button></el-col>
          </el-row>

          <!-- 角色列表区域 -->
          <el-table :data="roleList" border stripe>
              <!-- 展开列 -->
              <el-table-column type="expand">
                  <template slot-scope="scope">
                      <el-row class="vcenter" :class="['bdbottom', i1 === 0 ? 'bdtop': '']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                          <!-- 渲染一级权限 -->
                          <el-col :span="5">
                              <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                              <i class="el-icon-caret-right"></i>
                          </el-col>
                          <!-- 渲染二级和三级权限 -->
                          <el-col :span="19">
                              <!-- 通过for循环嵌套渲染二级权限 -->
                              <el-row class="vcenter" :class="[i2 !== 0 ? 'bdtop': '']" v-for="(item2, i2) in item1.children" :key="item2.id">
                                  <el-col :span="6">
                                      <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                                      <i class="el-icon-caret-right"></i>
                                  </el-col>
                                  <el-col :span="18">
                                      <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                  </el-col>
                              </el-row>
                          </el-col>
                      </el-row>
                  </template>
              </el-table-column>
              <!-- 索引列 -->
              <el-table-column type="index"></el-table-column>
              <el-table-column label="角色名称" prop="roleName"></el-table-column>
              <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
              <el-table-column label="操作" width="300px">
                  <template slot-scope="scope">
                      <el-button type="primary" size="mini" @click="editRole(scope.row.id)" icon="el-icon-edit">编辑</el-button>
                      <el-button type="danger" size="mini" @click="removeRole(scope.row.id)" icon="el-icon-delete">删除</el-button>
                      <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                  </template>
              </el-table-column>
          </el-table>

            <!-- 分配权限的对话框 -->
            <el-dialog
            title="分配权限"
            :visible.sync="setRightdialogVisible"
            width="50%"
            @close="setRightDialogColsed">
            <!-- 树形控件 -->
            <el-tree show-checkbox :data="rightsList" :props="treeProps" node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightdialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
            </el-dialog>

            <!-- 添加角色对话框 -->
            <el-dialog
            title="添加角色"
            :visible.sync="addRoleDialogVisible"
            width="50%"
            @close="addFormDialogClosed">
            <el-form :model="addRoleForm" ref="addFormRef" :rules="addFormRoles">
                <el-form-item label="角色名称" prop="roleName" label-width="80px">
                    <el-input v-model="addRoleForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc" label-width="80px">
                    <el-input v-model="addRoleForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRole">确 定</el-button>
            </span>
            </el-dialog>

            <!-- 修改角色对话框 -->
            <el-dialog
            title="修改角色"
            :visible.sync="editRoleDialogVisible"
            width="50%"
            @close="editRoleDialogClosed">
            <el-form :model="editForm" ref="editFormRef" :rules="editFormRoles">
                <el-form-item label="角色名称" prop="roleName" label-width="80px">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc" label-width="80px">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoleConfirm()">确 定</el-button>
            </span>
            </el-dialog>
      </el-card>
  </div>
</template>

<script>
import {addRoleApi, getRoleApi,delRoleApi, getOneRoleApi, editRoleApi} from '../../api/rolesApi'
export default {
    data(){
        return{
            // 所有角色列表数据
            roleList: [],
            // 控制分配权限对话框的显示和隐藏
            setRightdialogVisible: false,
            // 所有权限数据
            rightsList: [],
            // 树形控件的属性绑定对象
            treeProps:{
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点id值数组
            defKeys: [],
            // 当前即将分配权限的id
            roleId: '',
            // 控制添加角色对话框展示隐藏
            addRoleDialogVisible: false,
            addRoleForm: {
                roleName: '',
                roleDesc: ''
            },
            // 添加角色表单验证
            addFormRoles:{
                roleName:[
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 2, max: 6, message: '长度在 2 到 6 个字符', trigger: 'blur' }
                ],
                roleDesc:[
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 2, max: 15, message: '长度在 2 到 15 个字符', trigger: 'blur' }
                ],
            },
            // 修改表单
            editForm:{},
            // 控制修改对话框展示隐藏
            editRoleDialogVisible: false,
            // 修改角色表单验证
            editFormRoles:{
                roleName:[
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 2, max: 6, message: '长度在 2 到 6 个字符', trigger: 'blur' }
                ],
                roleDesc:[
                    { required: true, message: '请输入角色名称', trigger: 'blur' },
                    { min: 2, max: 15, message: '长度在 2 到 15 个字符', trigger: 'blur' }
                ],
            },
        }
    },
    created(){
        this.getRolesList()
    },
    methods: {
        async getRolesList(){
            const data = await getRoleApi
            if (data.status !== 200) return this.$message.error('获取角色列表失败!')
            this.roleList = data.data
        },
        // 根据id删除对应的权限
        async removeRightById(role, rightId){
            // 他那框提示用户是否删除
            const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)
            if (confirmResult !== 'confirm') return this.$message.info('取消了删除!')
            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if (res.meta.status !== 200) return this.$message.error('删除权限失败!')
            this.$message.success('删除权限成功!')
            // this.getRolesList()
            role.children = res.data
        },
        // 展示分配权限对话框
        async showSetRightDialog(role){
            this.roleId = role.id
            const { data: res } = await this.$http.get('rights/tree')
            if (res.meta.status !== 200) return this.$message.error('获取权限数据失败!')
            // 获取到的权限数据保存到data中
            this.rightsList = res.data
            // 递归获取三级节点的id
            this.getLeafKeys(role, this.defKeys)
            this.setRightdialogVisible = true
        },
        // 通过递归的形式,获取角色下所有三级权限的id,并保存到defKeys数组中
        getLeafKeys(node, arr){
            // 如果当前node不包含node节点不包含children属性,则是三级节点
            if (!node.children) return arr.push(node.id)
            node.children.forEach(item=>this.getLeafKeys(item, arr))
        },
        // 监听分贝权限对话框的关闭事件
        setRightDialogColsed(){
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights(){
            const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
            if (res.meta.status !== 200) return this.$message.error('分配权限失败!')
            this.$message.success('分配权限成功!')
            this.getRolesList()
            this.setRightdialogVisible = false
        },
        // 添加角色
        async addRole(){
            const data = await addRoleApi(this.addRoleForm)
            console.log(data);
            if(data.status !== 201) return this.$message.error('添加角色失败！')
            this.$message.success('添加角色成功！')
            this.roleList.push(data.data)
            // this.getRolesList()
            this.addRoleDialogVisible = false;
        },
        addFormDialogClosed(){
            this.$refs.addFormRef.resetFields()
        },
        // 删除角色
        async removeRole(id){
            const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=>err)
            // 如果用户确认删除，则返回值为字符串confirm
            // 如果用户取消了删除，则返回值为字符串cancel
            if ( confirmResult !== 'confirm' ) return this.$message.info('已取消删除！')
            const data = await delRoleApi(id)
            if(data.status !== 204) return this.$message.error('删除角色失败！')
            this.$message.success('删除角色成功！')
            const dels = this.roleList.findIndex(item=>item.id === id)
            this.roleList.splice(dels, 1)
            // this.getRolesList()
        },
        // 修改角色(获取将要修改的角色信息)
        async editRole(id){
            const data = await getOneRoleApi(id)
            if(data.status !== 200) return this.$message.error('获取角色失败！')
            this.$message.success('获取角色成功！')
            this.editForm = data.data
            this.editRoleDialogVisible = true
        },
        // 修改角色确认
        async editRoleConfirm(){
            const data = await editRoleApi({id:this.editForm.id, data:{roleName:this.editForm.roleName,roleDesc:this.editForm.roleDesc}})
            if(data.status !== 200) return this.$message.error('修改角色失败！')
            this.$message.success('修改角色成功！')
            const editIndex = this.roleList.findIndex(item=>item.id === this.editForm.id)
            this.roleList[editIndex] = data.data
            // this.getRolesList()
            this.editRoleDialogVisible = false
        },
        // 监听修改角色对话框关闭事件
        editRoleDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
    }
}
</script>

<style scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>